This may sound like blasphemy to anyone who loves Lucille Ball, the woman who pioneered the classic joke rhythms that Whitney Cummings so klutzily mimics. Cummings has none of Ball’s shining charisma or her buzz of anarchy. Yet she does share Lucy’s rictus grin, her toddler-like foot-stamping tantrums, and especially her Hobbesian view of heterosexual relationships as a combat zone of pranks, bets, and manipulation from below. “This is war,” Whitney announces, before declaring yet another crazy scheme to undercut her boyfriend, and it might as well be the series’ catchphrase.